Magma with high viscosity ( Answer => D )
I don't know if this question is missing some multiple choice options that go along with it, but...
One plate will subduct (go under the other plate), creating a trench or subduction zone. The other plate goes over the subducted plate, creating raised ground. This is how mountains and volcanoes are made.
It might be B) seawater.
I'm not entirely sure though, you may want to research if seawater can be created or not.
The answer is: "<span>denitrification" .
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The answer is Cardiac Arrest